Ans. Guru Har Gobind said:vlod eisbiznosHumility is the root of “Sikhi”.Service (of human kind) is the branches of “Sikhi”.
Holy congregation (Saadh Sangat) is the leaves of “Sikhi”.
Understanding the Word (Shabad) are the flowers, while the fruits are becoming completely oblivious of care for ones body (ones own well being) compared to the well being of others.